0.4+1.5 8.6-7 1+0.45 7×0.9 0.78×0.1 32.1×0.2 1.8-0.5 3.2÷32 0.36÷0.09 4.3-2.3
我仔细!我最棒!
1.口算(看谁做的又快又对!)